SDU is an abbreviation for:

  • Danish youth organizations in South Schleswig
  • Rio de Janeiro -Santos Dumont ( Aeroporto Santos Dumont airport), one of two airports in the Brazilian city of Rio de Janeiro after the IATA code
  • Service Data Unit, data packets in network traffic
  • Social Democratic Union, several European parties
  • Social Democratic Union, a former German Party
  • University of Southern Denmark, a Danish University of composite
  • Surveillance Detection Unit, an American intelligence organization

Sdu stands for:

  • Sdu, a Dutch publishing company and service company, consisting of the former state-owned enterprises Staatsdrukkerij en Uitgeverij ( State Printing and publishing ) emerged
  • Disambiguation
  • Abbreviation